/*
* ExceptionsAttribute.java 1.8 03/01/14
*
* Copyright © 2003 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package components;
import java.io.DataOutput;
import java.io.DataInput;
import java.io.IOException;
import util.*;
/*
* A class to represent the Exceptions table Attribute
* of a method
*/
public
class ExceptionsAttribute extends Attribute
{
public ClassConstant data[];
public
ExceptionsAttribute( UnicodeConstant name, int l, ClassConstant d[] ){
super( name, l );
data = d;
}
public void
countConstantReferences( boolean isRelocatable ){
super.countConstantReferences( isRelocatable );
int n = data.length;
for ( int i = 0; i < n; i++ ){
data[i].incReference();
}
}
protected int
writeData( DataOutput o ) throws IOException{
int n = data.length;
o.writeShort( n );
for ( int i = 0; i < n; i++ ){
o.writeShort( data[i].index );
// debug
if ( data[i].index <= 0 ){
System.err.println(Localizer.getString("exceptionsattribute.exceptions_table_references_negative_subscript", data[i]));
}
// end debug
}
return 2 + 2*n;
}
public static Attribute
readAttribute( DataInput i, ConstantObject locals[], ConstantObject globals[] ) throws IOException{
UnicodeConstant name;
name = (UnicodeConstant)globals[i.readUnsignedShort()];
return finishReadAttribute( i, name, locals );
}
//
// for those cases where we already read the name index
// and know that its not something requiring special handling.
//
public static Attribute
finishReadAttribute( DataInput in, UnicodeConstant name, ConstantObject t[] ) throws IOException {
int l;
int n;
ClassConstant d[];
l = in.readInt();
n = in.readUnsignedShort();
d = new ClassConstant[ n ];
for ( int i = 0; i < n; i++ ){
int index = in.readUnsignedShort();
d[i] = (ClassConstant)t[ index ];
}
return new ExceptionsAttribute( name, l, d );
}
}
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